Images

I'll play, but can't take any credit. Tony65x55 has done some incredible designs around the KFm. Here are my two favorites:

The first is the 46.5" Piper PA-36 Pawnee Brave with KFm2/wingcaps. 16oz AUW and a gorgeous silky-smooth flyer.

The second is the 60" Blu-Baby AP1 with Tony's 2-step KFm3. Primary step height is 10% cord at 50%. Second step height is 5% cord at 75%. 25oz AUW and an ultra-stable, workhorse AP platform. I've personnally lifted an 18oz payload with this plane . Amazing.

The third pic is Tony's Pawnee again, scaled up to a 70" wingspan and fitted with a KFm3. 35oz AUW.

EDIT: I've had a couple of questions regarding the KFm3 airfoil so I posted a couple more close-up pics. The wing has a 10" cord. The first step is 1" total height (a 1/2" thick, full-length spruce spar plus the upper and lower foam thicknesses) and terminates at 50% cord. The second step is 5/8" total height (a 1/8" foam spacer plus the upper and ower foam thicknesses) and terminates at 75% cord.

Donít know (read >remember<) if I mentioned here on RCG;
Over the years, my (mostly yours from this book) paper planes have flown from hotel windows around the world. Guess, maybe, several hundred thousand air miles on this book since 1986 ? 87.

Here us another Tony65x55 designed Pawnee PA36. WS is 46" and the motor is a 2410-09 from Heads Up RC. Flys great and is a great aileron trainer. Ailerons failed on the third flight due to missing servo horn screw and I was able to save it rudder only. Bob